diff --git a/puzzles.but b/puzzles.but
index 4fc471c..21ee8b1 100644
--- a/puzzles.but
+++ b/puzzles.but
@@ -22,7 +22,7 @@
 
 This is a collection of small one-player puzzle games.
 
-\copyright This manual is copyright 2004 Simon Tatham. All rights
+\copyright This manual is copyright 2004-5 Simon Tatham. All rights
 reserved. You may distribute this documentation under the MIT licence.
 See \k{licence} for the licence text in full.